package edu.friday.config;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.parser.ParserConfig;
import com.alibaba.fastjson.serializer.SerializerFeature;
import com.fasterxml.jackson.databind.JavaType;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.type.TypeFactory;
import org.springframework.data.redis.serializer.RedisSerializer;
import org.springframework.data.redis.serializer.SerializationException;
import org.springframework.util.Assert;

import java.lang.reflect.Type;
import java.nio.charset.Charset;

//auth.userDetailService(userDetailService).passwordEncoder(bCryptPasswordEncoder());
public class FastJson2JsonRedisSerializer<T> implements RedisSerializer<T> {
    @SuppressWarnings("unused")
    private ObjectMapper objectMapper=new ObjectMapper();
    public  static final Charset DEFAULT_CHARSET=Charset.forName("UTF-8");
    private Class<T> clazz;
    static {
        ParserConfig.getGlobalInstance().setAutoTypeSupport(true);
    }
    public FastJson2JsonRedisSerializer(Class<T> clazz) {
        super();
        this.clazz=clazz;
    }

    @Override
    public byte[] serialize(T t) throws SerializationException {
        if (t==null) {
            return new byte[0];
        }
        return JSON.toJSONString(t, SerializerFeature.WriteClassName).getBytes(DEFAULT_CHARSET);
    }

    @Override
    public T deserialize(byte[] bytes) throws SerializationException {
        if (bytes==null||bytes.length<=0) {
            return null;
        }
        String str=new String(bytes,DEFAULT_CHARSET);
        return JSON.parseObject(str,clazz);
    }

    @Override
    public boolean canSerialize(Class<?> type) {
        return RedisSerializer.super.canSerialize(type);
    }

    @Override
    public Class<?> getTargetType() {
        return RedisSerializer.super.getTargetType();
    }

    public void setObjectMapper(ObjectMapper mapper) {
        Assert.notNull(objectMapper,"'objectMapper' must not be null");
        this.objectMapper=objectMapper;
    }
    protected JavaType getJavaType(Class<?> clazz){
        return TypeFactory.defaultInstance().constructType(clazz);
    }
}
